PHP Tutorial - PHP deg2rad() Function
Definition
The deg2rad() function converts degrees to radians.
Syntax
PHP deg2rad() Function has the following format.
float deg2rad ( float num ) Parameter
| Parameter | Is Required | Description |
|---|---|---|
| num | Required. | Degree to convert |
Return
| Item | Description |
|---|---|
| Return Value | The radian equivalent of number |
| Return Type | Float |
Note
To convert a radian value to a degree value, look at the rad2deg() function.
Example
Radians are calculated as being $degrees multiplied by the mathematical constant pi, then divided by 180.
/*www.ja v a2 s. co m*/
<?php
echo deg2rad("45") . "\n";
echo deg2rad("90") . "\n";
echo deg2rad("360"). "\n";
$deg = 180;
$rad = deg2rad($deg);
echo "$deg degrees is equal to $rad radians.\n";
$sin1 = sin(deg2rad(80));
print $sin1;
?>
The code above generates the following result.
